Abstract Tb3+ doped Ca14Al10Zn6O35 phosphors were prepared by a traditional solid-state reaction approach. The Tb3+ doped phosphors exhibit blue and green emission under 285 nm excitation. The green to blue emission ratio is gradually enhanced as the Tb3+ concentration increases, which is ascribed to the enhanced cross-relaxation energy transfer (CRET) processes among Tb3+ ions. Li+ ions were introduced to the composition as an attempt to address the charge mismatch induced by ion substitution. An enhancement of green emission after co-doping Li+ ions with Tb3+ ions is witnessed. The lifetime measurement confirms that the CRET efficiency and energy transfer rate are simultaneously increased by Li+ ions. The results suggest that the incorporation of Li+ ions is a feasible approach to overcome charge vacancy defects and enhance CRET processes.

中文翻译：

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通过 Li+ 离子的交叉弛豫能量转移增强 Ca14Al10Zn6O35: Tb3+ 荧光粉的绿色发射

摘要 采用传统的固相反应方法制备了Tb3+掺杂的Ca14Al10Zn6O35荧光粉。Tb3+ 掺杂的磷光体在 285 nm 激发下呈现蓝色和绿色发射。随着 Tb3+ 浓度的增加，绿色与蓝色的发射比逐渐增强，这归因于 Tb3+ 离子之间增强的交叉弛豫能量转移（CRET）过程。Li + 离子被引入到组合物中，试图解决由离子取代引起的电荷失配。见证了 Li+ 离子与 Tb3+ 离子共掺杂后绿色发射的增强。寿命测量证实，CRET 效率和能量转移率同时因 Li+ 离子而增加。结果表明，锂离子的掺入是克服电荷空位缺陷和增强 CRET 过程的可行方法。